Test preparation
Recognise forces, draw diagrams, calculate, explain.
64 carefully scaffolded questions · four levels · complete worked solutions.
64new questions
R · T1 · T2 · Ifour question levels
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LEARN WITH THE DIAGRAMS
Visual reminders
Each diagram links a formula to a skill that you need in a test.
Resultant force
Fnet = ΣF
Draw the forces on one object first; combine the arrows in one direction.
Force and acceleration
Fnet = m × a
A non-zero resultant force changes velocity, not necessarily direction.
Collision safety
Favg = m|Δv| / Δt
Increase collision time to reduce average force. A larger contact area lowers pressure.
Forces → acceleration → braking → collision force.
CHOOSE AND PRACTISE
Your own practice exam
The extensive v2-style lessons remain available. This separate environment adds graduated questions and an exam mode without reducing the original theory.